Concrete road finishing machine



E. G. CARR [CONCRETE ROAD FINISHING MACHINE- May 10, 1932.

3 Sheets-Sheet Original Filed Aug. 11. 1922 May 10, 1932.. E. G. CARR CONCRETE ROAD FINISHING MACHINE May 10, 1932.

E. G, CARR CONCRETE ROAD FINISHING MACHINE Original Filed Aug. 11. 1922 s Sheets-Sheet s .oither direction. 'by the drawn Reissued May 10, 1932 "ounce STATES PATENT OFFICE.

G. CABR-,-OF-CH-ICAGO, ILLINDIS, ASSIGNOR. TO THE LAKEWOOD ENGINEERING COMPANY, OF LAKEWOOD, OHIO, A C'UIEEOIii-ULION 10F JOH'IO CONCRETE ROAD FINISHING MAG-HIRE Original No. 1,611,412, dated December 21,1926, Serial No. 581,Q43, fi 1ed August 11, 1922. Application at;

reissue filed December 20,

"This invention relates to concrete road finishing machines. The general object of the invention is to improve the construction and operation of concrete road finishing machines in the manner to be hereinafter described and claimed. A more specific object is to provide in a road finishing machine a .templet or screed member which is so arranged that av downward pressure component will be exerted thereby upon the concrete, thus increasing the pressure of such member upon the concrete.

Referring to the drawings which accompany this specification and form a part hereof, which drawings illustrate an embodiment of the invention and on which the same reference characters are used to designate the same parts wherever they may appear in each of the several views, Fig. 1 is a plan view ofa concrete road finishing machine, parts being broken away; Fig. 2 is a side elevation of parts of the machine; Fig. 3 is a front elevation of parts of the machine; Fig. 4i is a vertical section on an enlarged scale taken on line 4-4 of Fig. 'llooking in the direction indicated by the arrows; Figs. 5 and 6 are views similar to Fig. 4: but showing the templet or screed member tilted to different positions; Fig. 7 is a vertical section taken on line 'T7 oi F 1 looking in the direction indicated by the arrows; Jig. 8 is an elevation of parts of the machine, the line oi sight being directed longitudinally of the templet or screed menihe'r shown in Fig. 1; 9 is a plan view of an end of another templet or screed member and associated parts 10 is a vertical section taken on line 10-1O of Fig. 2 looking in the direction indicated by the arrows {Fig '11 is an elevation of parts of thectemplet or screed member shown in Fig. i; and Fig. '12

is a perspective view of an end of the same member.

The reference numeral 1 designates a frame of any suitable construction which is mounted on wheels lhe wheels 2 are adapted to run upon the forms 3 and at and be rotatedv by the motor 5 toprop-el the machine in The motor 5 is illustrated an internal combustion nlotor or engine which runs, or turns over,

1928. .Serial No. BZYAE inonly one direction; and, to provide-for the propulsion otthe machine in either direction, a sprocketwheel 6 and'sprocket chainTcan rotate the sprocket wheel-8,- the shat-t"9,'the gear 10 and the sprocket wheel 11. ".Fl he wheel 11 are all connected to the shaft .9111 any suitable manner so that these several parts rotate as a unit. The gear 10 meshes with the gear 12 whichisafloose gear-0n the I shaft-13 and the sprocket wheel 15;.which is a loose sprocket ivheel, onpthe' shaft '13, is connected with the sprocketwhee'l ll bythe sprocket chain 14. The gear 12 isprovided with a clutch 1ne1nber16 and; theosprocket wheel 15 is provided-witha clutch member:17 It will ofcourse,'beunderstood that the gear 12and the sprocket wheel 15 are-restrained 'i'romflongitudinal movements on; the shaft 13, while being free to permitallrelativeinove- 5 sprocket wheel 8,-t egear 10 andthe sprocket ments of rotation. A'clutch 18 is secured to the machine can be propel-led forward or backward or can be stopped. The shaft 13 is 7 extended to-rotate longitudinal shafts 20; one

ofwhich is arranged at each side-of the machine by a gear mechanism contained 1n housings 21 and, 22 while the longitudinal shafts 20 are geared to the wheels Q'by a gear mechanism containedin journal boxes 28.

The frame 1 supports a templet or screed 1ne1nber'24 intended principally for spreading the concrete andafioat or finisher 25. v A second templet or screed member 26, primarily intended for smoothing the concrete but also serving, to a certain extent, as ;a strike-011 or spreading member, is located between the templet orv screedmember 2 1 and the float 25 and is so arrangedthat it may be supported by the forms 3 and 4 or may be raised from the forms and be supported from the frame 1 of the machine.

The float or finisher 25 consists of a piece of textile fabric or other suitable material secured to a frame 27. The frame 27 is supported by bearings 28 which are secured to the frame 1 and the frame 27 is both reciprocable and rotatable in the bearings 28 so that it can be reciprocated longitudinally or can be turned up or down to remove the float 25 from the concrete surface or to place it in contact with the concrete surface;

The templet or screed member 24, the float or finisher 25 and the second templet or screed member 26 are severally reciprocable longitudinally of themselves substantially transversely of the roadway and may be reciprocated in the following manner. A crank device, such as an eccentric 29, for example, may be loosely mounted on the shaft 13 but restrained from longitudinal movements with respect thereto and be provided with a clutch member 30 adapted to be engaged by a clutch 31 which is splined, for example, to the shaft 1.3. The clutch 31 may be actuated by a clutch-rod 32. An eccentric strap 33 and a connecting rod 34 communicate motion to a motion transmitting device 35, whichis illustrated in the drawings as a three-armed lever pivoted to the frame 1 by a pivot 36. The templet or screed member 24 is connected with the motion transmitting device 35 by a link 37 which is loosely pivoted at both ends to permit the member 24 to be reciprocated in different positions of elevation. The other templet or screed member 26 is also connected with the motion transmitting device 35 by a link 38, which is loosely pivoted at both ends to permit the member 26 to be reciprocated or raised or lowered. A lever 39 is pivoted to the frame 1 by the pivot 40 and is loosely pivotally connected with the member 26 by a link 41 at one end while its other end is connected with the frame 27 in any suit manner as, for example, by being bifurcated and straddling the frame 27 between two collars 42 and 43 which are secured to the frame 27. The extent of movement of the templet or screed members 24 and 26 and the float or finisher 25 in their several longitudinal reciprocations can be readily provided for by the distances the links 37 and 38 are located from the pivot 36 and the distance the link41 is located from the pivot 40.

It is preferred that the templet or screed member 24 reciprocate horizontally since its purpose is to initially spread or strike off the concrete for the lower courses which has been placed in the roadway between the forms by the mixing machine. This member is preferably supported upon anti-friction rollers44 which run in guides 45 secured to the frame 1, such rollers being placed upon the horizontal ends of cranks 46 and 47 upon which the member 24 is hung. The cranks 46 and 47 are provided with op crating levers 48 and 49 which have hand grips 50 and 51 to control pawls which are 49 are connected for simultaneous movements by a rod 54 so that the templet or screed member can be raised or lowered from either side of the machine to suit the convenience of the operator, and a ring 55 may be slipped over one operating lever and its hand grip to hold the pawl for that hand grip out of engagement with the sector for that particular operating lever. Anti-friction rollers may be provided to take thrust from the templet or screed member 24 and in Fig. 1 of the drawings two such anti-friction rollers 56 are shown mounted in the frame 1. The member 24 is illustrated by the drawings as shorter than the distance between the forms 3 and 4 and the extent of vertical movement provided for by the cranks 46 and 47 is sufficient to enable the member 24 to be lowered between the forms or to be raised above the forms. WVith such a construction the templet or screed member 24 can be lowered between the forms to spread a sub-base of concrete for a brick or stone pavement, or for any spreading purpose whatever, and at the same time, this templet or screed member can be raised or lowered to spread material to the height of the forms, or above. The vertical lift of the member 24 should be sufficient so that it can be raised above the surface which it has formed when spreading so as to clear the same and leave the surface undisturbed when the machine is running back over that portion of the roadway.

The reference numerals 57 and 58 designate plows which also serve as form cleaners which are preferably yieldably secured to the frame 1. These plows 57 and 58 extend from outside the forms inwardly and backwardly so as to be at all times at their inner ends in front of the ends of the templet or screed member 24, notwithstanding the fact that such member is being reciprocated. The plows are secured to pivoted U-shaped frames 59 and are yieldably held down by spiral springs 60 which surround links 61 and are held between collars 62 and brace members 63. The links 61 have bent ends which pass through holes in the U-shaped frames 59 and may be held in place by cotter pins 64. The collars 62 may be held in position by cotter pins 65. The links 61 pass through holes in the brace members 63 and are provided with nuts 66 to limit the downward movements of the plows so that the iso sameic'am beiseit ztejlist: clean'rthe forms with out" belring aori 'serubbingz :thereonzz The templetion; screed member Wins-pros vided with? rakers' [66! at' eacli end iwhichnim cline inwardlyi a-ndtibackwardly to prevent: materialube ingl-pushed out over thei' ferms: a'szl the templt" or 1 'sc'reed' z'niember==24-'%is 'reciproe cated 'andawhen -it is aworkiengc' at the heightwofi 5 the topsv of TthB f01 IIlS0r iab'over When-this member :isworking at 'rtlie height @015 thee-tops: o'f-iitheafdrms or above, the-.rakers1:-66 are;in part, behind the. .plows '--57-;a-nd1"58 and :it:.wi11:=. be evident that themembe'ryas -it -"is.zrecipro-" canted-, cannot push: Inaterizath ofi'? overi thev fdrms: lnotherwords, the endrofithe-templt on sereed member 24 cannotepush mate rial :entlwisebecause;the? plows'nand rakers' movesthezmaterial to -points inside i the ends: ofzisuoh 1 members i The plows 2'5? 5 and-458 are provided-with parts GZ to he contztctedby the member Miatolift the plowswhmsuciimeme ber'is elevated to air outsoftheaway position? The reference numeralfiS designatesaior-m scraper whichr'is uni-versally yieldable inwall" directions and the purpose of iwhichtis to 1 scrape any-pebbles, sa nd,-or cemen'tmortar-or" other-obstruetidnS from the for-ms' inr advance ofvthe second-etemplet: or screed mernber' 26= which; in the presentfembocliment, iszintend 311i ed to ride accurately upon the forms-. The

form *scra-penfiBds 'sillustnatech aby the drawingsns composedof aiflatz'phi-te 69-provide d with! elongzited slots Y =70 f01-= bo1ts 711 which. adjnstablysecnre itto :spina'l: springsfiflzbolt'i .z i'ed 'to-a piece of migleironw73 whioh isfastened tothe-frame 1; The-secondst-empletao'r screed member 2 26 is positionedflengthwi'se of i the. machine interniediate the member 24sand the finisher 25 by; radius rods -74 and J75, w-hiohvv are pivotedr to tlie' membemQG and wto eccen. tri'c strap's- 76' and 77 by 1.=vertical jpi\iots 178,: 79; 80 and 8h.- The eccentric straps- 76 a-nd 7 7 surround ecce-ritrics-SQantl i83'whiclnform convenient crankmembers'for tiltingsthetenn; P184:- br screed membe-r 26: The'fieccentric's :82" and I 83- .are' fast on a shaft i84 which is -sup'-:= portedby: the frame. of :the unaehinwan'dwit wilL- be evident thatby rocking: the E shaft 84 tliemnder' or concrete cngagingsuriace of the: :tem let-- on screed member 26 =niayw; he-a placed K it or horizontal; asrshown byxiFi'gx 4;; or may be tiltedupwardlywas-showmby; Figs: 5 anchodependingyof co'ur'se,'=uponithe (lireetionzin which -thez maehinewis moving": The member 26,?W-hendn-use' \wilibe suppo|11t--.v ed. by "the -form's ,1 andwassuming -a= direction: of movementr'of the nnmhineio adVanoe-sueh; member from right. to left when looking; at Figsul -.-and -5 30f; the drawings, the atemplet or screed zinember may bekepfi-flat as :shown': by wFigi: More its-leadin g edge; -.may r'aisech as shown-aby'ig; 5ato smooth? anclncompress these oncreter There may be 1 certain zcircum-tz stances as, sforw example; :wii'eni the conerete i piled too highk-whn itis. desirablesto arrange ora tilt the member 26 tliat itsnfollowingi edge'tzwill the elevated f asshbwn ibygF ig tig still assuming the machines be'imovingr from right tGFf left; whereby its leadingredge will have a:morewpronounced tendncyitoepiishxnr is spread the conorete-a rather: :th antitendingizto compress and: smooth theisa-me;

It i is not=iinaccurate:to-z describe the tend encyxofxthe member- 26 'Whenrzinthe position shown? hYiF ignL-(SQS aicli-ggii1gstendency;ibear inguin :mindguhowever; :that such=* member in the; present-ev embodiment-2 is restrained fronn dowl'iwardwmevement by the"- formsi: upon which it restsg bnt thatiitfconld 'move downs Wi l-Ed ato the forms if r'it' were elevatecir-above the' samebyzthe concrete: W henthe member 26-:is arranged-as:showmin 1:4 with the bottom; s1nifaee ithereof= lying-in: a honizdntalv plane and the front face thereof disposedi inasubsta-nti'allyva hvertieala plane; the downwardwnnitpressure10f the'lmember uponz the; coneretAisdependent upon the "weight: ofrthe templetor screedmember itsel t. During for: Wardtmovement ofthe member, the concrete; will epiie' iillp'i against its front :face f and thus; cause a re action offsetting: the kinetic energy; 013 the-zfcbrward=movement by the horizonta l pri-sss'zure of the'concrete iri front= of the mem ber: Also there is no vertical T- component-- pressur'e created 'wv hen thertemplet or screed! member: is used-yinrthis.position: However, when the member-'Qfids im-the posit-ion1sl1owm in? :Figae 51-withits: forward @or leadingrerlgefi upwardlywtilted; the kinetic energy; of for- Wardniovement is resolvectby tliepress-ure 0f" the concrete in front of the :Inember into a. downward-action on:the frontof the-:temp'let or: screed which, in turn; -,must be: 1 reacted: against-by ithe concrete heneath the member andxthus increase the-actual pressure on 'sne'lr portion of'theconorete: Itis clearthatatter the heavy-head of--concreterhasibeen spread byam-templetr or screed: member tilted; assin Fig.-:6,--iti willkimpar-t xa rfinal pressure to the concrete and-willalso exert --a, Wiping smoothing 0r-.- 'finishinga' '1' action thereon; The tilt-r ing of thetleading edgeof the screed:-0r--tem-- plet giv'esan additional-cro'wding;compress-- ing; orsql eez-ing action --not-presentwhen the bottom: and-. front sicleofsubh memberare in the;relationshipgshown:inyF-ig j 4; and results-in the' member: grippingze transverse sectiorrof the conerete ina manner Whiohmar teria-llyl adds to theagitati'on and working of the rhassmnd thus brings ;up;1nortar for the* final finish: and ileliminates -exoess' Water and a air voidsu, Of course substantially the same results woulcl ibe obtainedwere the bottom of the member arranged-- in a horizontal plane ands-the front sidethereof disposed at a rearweirdly -.inclined- "acute :wangle thereto L either for its flill extent" or: 'for akportion of iitssex tentadj aeent the bottom surface;-- Sl'IlCE'llXl-L derforward movement of the'fmemher there would be a downward==omponentcreated by crete andbe supported from the frame 1 of. the machine bychains 91 and '92 which are attached thereto and to drums 93 and 94.

the concretebuilt-up in front'of the member which would provide the added pressure and increase the agitation or kneading ac tion thereof. It should be stated at this time that. although in the embodimentdisclosed. and described herein the'templet or screed member26 is described as being principallyintended: for smoothing the concrete which has been substantially spread by the member v 24, that theprinciple just above stated, namely arranging the templet or screed member so as to create a downward pressure compo nent and thereby increase the pressure of the member upon the concrete, could be applied with equally satisfactory results in a machine .of the. type employing only a single screed or templet which performs the dual functions of a spreading and smoothing member:

-The=shaft84 can be rocked and the mem-' ber'26 tilted by the hand levers 85'and 86 which are secured to the shaft 84' and which may be retained in selected positions by handgrips 87 and 88 which. control pawls adapt ed to engage in'notches in sectors 89 and 90 which are fixed to the frame of the machine. One pawlican be held disengaged fromits sector by a ring slip-over around the lever and its handgrip in the manner already described in connection with the operating 1evers and hand grips for the screed or templet member .24. The templet or screed member 26'can be raised from the forms and the conwhich are-securedto a shaft 95 supported by the frame 1 of the machine. Thelshaft 95 can be rotated in any suitable or convenient-manner and retained in a predetermined position with the member 26 raised or elevated by any suitable mechanism as, forexample, ti-pawl,-

hand grip and lever mechanism, notshown, c'oacting with a fixed sector 96 in the same manner as, the shaft 84 is operated, it being understood that the drums 93 and94c with such: a construction are large enough to wind up the chains 91 and92 to the extent required for.

the-rocking movement which can be given to thesha'ft 95. 'VVhen the member 26 is low-- ered onto the forms the chains 91 and 92will be slack enoughto permit longitudinalreciprocations thereof; The' templet or screed -member 26 is illustrated by the drawings asbeingdisposed obliquely to the direction of motion of the machine or obliquelywith respect to the forms 3'and 4, and when the m'a'' chine is in motion and moving ineither direction the member 26will-tend to move material sideways, and one of the objects ofthis invention is to'move material away from the forms towards the center of the road to keep maintaining. the crown ofth'e roads" Both of the members 24 and 26 have their under surface archedor cambered to conform to the ting into the space between the planks. A.

bottom 100 is secured to the lower edges of the planks. As a matter of convenience I prefer to use channel iron for the bottom 1 00 as the flanges of th'e channel iron can be fastened to the planksby fastening'slOl, leaving the under surface of the channel iron perfectly smooth. The channeliron is not'fastened to the planks clear to the ends thereof butis free-at its ends which. are designated by the reference characters 102. and 103 so that its ends can bend and warp. The ends 102 and- 103 may be made more flexible by being cut, as indicated bythe reference numeral 104, through the flanges of the channel iron .or separate, renewable pieces can be used for the ends. Screwthreaded bosses 105 are secured to the ends of the bottom 100 and screwth'readed bosses 106 are secured to. the top 99 and a screw 107, with right-hand threads at one end and'with left-hand threads at its other end is'provided at each end to engage with the correspondingly screwthreaded bosses105 and 106.-

It is evident thatby turning the screws 107 the ends'l 02 and 103 of the bottom can be moved away-"from the top 99 and the planks 97 and 98. If the member 26 is resting upon the. forms and a screw'107 is turned in the direction toseparate the top and the bottom, the top 99 and the planks at that end will be raised or elevated. Each screw 107 is provided with a lever 108 for turning it and a rod 109 is a lso connected withthe lever 108 and extends between the planks 97 and 98 to the opposite side of the machine so that both screws can be'operated from either side of the machine. The operation is as follows. Looking at Fig. 1 of the drawings and assuming that the machine is advancing with the templet or screed member 24 in" front of, the member 26, the screw 107 at the righthand end of'themember-QG will have been turned to raise the right-hand end of'such member to render it inactive on the down slope of thecrown of the road and the lefthand half of'themember willtend to crowd material away from the form 3 towards the center of the road and so tend to build up the crown of the road or maintain the crown ofthe road. If the direction of the movement of the-machine be'reversed, the float will be turnedupout of contact with the concrete, the screw at the right-hand end of the member 26 will be turned to lower that end of the member and the screw at the left-hand end of-the member will be turned to raise the lefthand endof suchmember to render it inactive. In this manner, first oneside of the road can ZhGLOPGDfitGdZIlPOIIS and: then: the-otherandthe crown of the roadzbezpreserved.

"tillherreferenee. numerals: 11-.Orande111 designate :nakersconnected to "the aimember .26? to Emit-kc: material ;.away; from the forms tow ands *the. .'eenteiu -of the: roazd. aThea. Baker, 110ris; il- ;-:lnst1'.ated as:.;a; triangular: piece ofrsheeta metal --with:;up.tnrnedi edges 1.112, .113 and114 and one;.:upturned-e edgei i s fastenecl to! asaflange of m athe-iendz offithethannelrbam bottomillOO. The size of the raker llOishould.beisuch athatits -edge11141snevenapasses totheinside oflthefform adiiringrtherreciprocations ofthe member-t26 aandiitsedge 112'shoiild'abe. obliquetozthewform was clearly" shown :by 2::Fig11rej 1 of: the draw- --ings. The makerlll iis illustrated by n'the idiraw ingsnas pivoted :Lhy ;a pivot: 115'. to :tbe "member" 26 andit :is apnovided :wvi-th Oblique -tee'thcor rakcs :E1-16,=:117.-:andi 1181M: diflerent wlengths and :aistopi 119it-limitsithe downwar'd movement of the rakes or teethttoajust above i the lower surkface of: the: channel iron botitom 100. An: arm r120aisspnovided with an ianti' frictioni roller 1:211 and the iframe Lhas a traok mei'rtberii122spivoted to i it by L3,. pivot 123. iBhe-trackmember 122' isiprovidedwith a track 124 which is bent dOWVIlWELId'lYiHhllJS outerend 1 and which: is shorter than the re ciprocating': stroke f 1 the .t-emplet on screed m member 26. The -r track ememher 12122 .:is= ex- "tended beyondrthewpivot 2123 130 fiOEIIl 1 a stop arm: 1251which-projects under the rframe i1 and prevents the track 124 from heingade:

pressed below a predeterminedzposition. while permitting iit tot-be.- elevated above" thatrrpositi on. Vilhen'ithe member-26 issbeingreciprocubed: tothe-right, looking at Figsrl, 2, and'7 of thew'dr awings 5 the rantiefriction roller i 121 will be highenithamtherdownwardly-bent-end 4 4 ,igfithe rack 21124411115. willri'de 111p over: the

track 124, lifting the teeth 116,.a117zand2118, sothat there willibemoapossibility: oftheiteeth contacting-with uanysmaterial rwhich: might beotherwise contacted with. "When 'thB'EIIIEIIl- 7' *,her' 26 Jl'lElSa nearly wreached fthe i.-'limit :of its movement to thed'ightgthe. antisfriction roller 121 will reach the end ofithes track 124:" and ddnoptovercthe .erid of atheisame letting. the

:raker llilatd ropsa gainst'the stopn119. "On-the 5'5 reciprocation: vofithe :member 3. 26 in :the 'op- :positeatdirection,:the zantiefnietion roller .121 flwillimnanndertthe' tracki124: andrwill elevate the same when the downwardly bent end of f therrtmck iisx:reaiihdandiwpassciinto theg'clear. "iThe -track :member -122 =will drop until its :iStQP am; 125' contacts'with the fframe ;1,- and athe spurts; will then; be imposition; for repeatingcthe'xcyole f operations. The actionof ethemaken l ll will be'to liftover and-rake-back m0 s towards theicen-terr-ofatherroed.

' i'l'lhezaction' of the'raker 110 will :be. torake -1materi1l,-'which z-may hevlrigh itowards 1, the

center of the road and there will be no tendaencyr to pushcmaterialv overtheforln because :ztheeedgeull isinever;:insidetherform.

rand'106 =so; tightlywasito: prevent warpingmr twisting of the ends ndf the 1 bottom 2.100 %--of determine: a: surface by spreadingsaction while its under surface wilh actrwith-e a smoothing action [upon the :snrface'madept-determined.

claim The reference numeral 126 designates 1a skid-j ack which is now welliknown and does not need to; be: specifically described here.

The: operation of the: machine willibe readily understood :5 from the ::foregoing descnipmo 'tion. The-.templet or screedimembeiz 24; can be: lowered :betweentthe fo-rms f'or v thegpurk-poses described, orican :be set at: the devel :of :the ifOl'II-IS, '01 above: the level of: the ffO'I'IIlS.

When the member 24 is raised waits-extreme position, the aplows?57*:and'1'58'wvill'1 be lifted. VJhen the machine'is-abeing runvbac-kwrard, the float or finisher 125,: and its frame; -2'7;./wi'll be turned: up *in' the-customary manner. The

screws 107 do; not 'fit W-ithi11 the bosses, 105 580 the templetior screed membertz26rand these n xThef trailing-1 end: oft-he templet or; screed ing end of the member will incline according to=the CI OWIX'OII tltS FSEClG. ofstheizroad-z-and "willwhngthef'form on iitsteside ofsthe road.

The under sidemof the templeteor-iscreed :zmemberk24; Whilerarchedto; thezcrown of the roe ch is zpreferably flatwor ihorizontalvlengthwise of: therroad-rsoast'oi'act: in additiomto' its spreading function alsoas: smoothing item- 'rpletworscreed.

;-In other words; its: front: lower edge w ill This is of special importancevawhemtheatemiplet orecreedwis v-beingcused on f concrete be- .low' the'level ofthetops (ifjtheaforms 50-" Although in 1-.the embodiment: disclosed o Therein, a y gpreadin-gtemplet or screed: andea :smoothing *tem-plet onscredrare shown: and tlescribech it shouldrzbe understood-"that :the invention .is notto :be limited toithi-sgparticular; arrangement, since ta singleatemplet or screed-member may per form both functions :on-a plurality of-suchimembers may'lmawused each 1 :of which performs 3 both 1' functions Kin -whole or input. =-It should also be'nnderstood that-the invention .isi to be :limited totthe embodiment shown only, insofan as thetappended claims-so limitit.

.sHaving thushdescribed any "invention :"I

1. "In :a concrete -road finishing Lmachine adapted: to he: advanced alongea -roazdway, 2a

templet or screed member".extendingsubstan- .tially the entire -=wi'dth of; the :roadway rand reciprocabletransversely aofr'the roadway-as a :unit: and havin'gwits leading upstanding face 'reanw-ardly='i11clined ."w-ith; resp eotcto the avertical whereby 1a: :headwof concrete built :up i in front of the member: as-the machine :advances will iexert-a downwardcpressure component tially the entire width of the contact with forms,

said rigid part, means ishing machine,

upon the concrete beneath the member from end to end thereof.

2. In a concrete road finishing machine adapted to be advanced along a roadway, a templet or screed member extending substanroadway and reciprocable transversely of-the roadway as a unit and having its under surface inclined with respect to the horizontal from end to end thereof. 7

3. In a concrete road finishing machine adapted to be advanced along a roadway, a

templet or. screed member reciprocable substantially transversely of the roadway, and means for tilting said member to selectively arrange its under surface upwardly inclined with respect to the horizontal and either its leading or following edge elevated.

4. In a concrete road finishing machine adapted to be advanced along a roadway, a templet or screed member reciprocable substantially transversely of the roadway, and

means for tilting said member to arrange its under surface inclined 'with respect to the horizontal.

5. In a road finishing machine, the combination witha smoothing templet adapted to engage with. the road forms at both of its ends, means for reciprocating said templet longitudinally of itself, and means for rendering a part of said templet inactive. I I

. 6. The combination with a smoothing templet adapted to be reciprocated longitudinally of itself, and provided of means for elevating one end of the templet while leaving the other end of the templet in position to work on the other side of a road.

7. The combination in a concrete road finishing machine, of a smoothing templet including a rigid part adapted to contact with and work upon the concrete, and an end part relatively movable vertically with respect to to vary the relative positions of said parts, and means to reciprocate said templet longitudinally of itself.

8. The combination with a smoothing templet, of means to reciprocate the templet longitudinally of itself, and means for tilting the templet transversely with respect to its length so as to work upon concrete with an edge ofthe templet.

9. The combination in a concrete road finof a smoothing templet, means for reciprocating the templet lon itudinally of itself, a raker, and means or elevating the raker when'the templet is moving in one direction. 7

1 0. Thecombination in a concrete road finishing machine, of a smoothing templet, radius rods, means for reciprocating the templet longitudinally of itse1f,.means for raising an end of the templet independently of the other end, means for tilting the templet transverselv of itself so as to work concrete with an edge of the templet, and means for elevating the templet from the forms.

' 11. The combination in a concrete roadIfinishing machine, of a reciprocatable spreading templat, a reciprocatable smoothing templet, and a reciprocatable float or finisher in such close relationship to each other that the concrete is in the same unset plastic condition under the smoothing templet and the plet, means for rendering a part of the smoothing templet inactive, a float or finisher, and means for reciprocating the spreading'templet, the smoothing templet and the float or finisher. 1

13. The combination with a concrete road finishing machine, of a form cleaner plate, spiral springs forsupporting the cleaner plate from the machine, and means for adjusting the form cleaner plate with respect to the form.

14. The combination with a frame adapted to be supported by forms, of a reciprocatable spreading templet of less length than the width between the forms, and means for setting the spreading templet to different eleva- -t1ons. With'means to 15. The combination with a frame adapted to be supported by forms, of a reciprocatable spreading and smoothing templet of less length thanthe distance between the forms, rakers at the ends of the templet, means for reciprocating the templet longitudinally of itself, and means for changingthe elevation of the templet.

16. The combination with a frame adapted to be supported by forms, of a reciprocatable spreading templet, plows, means to recipro cate the spreading templet, means to change the elevation of the spreading templet and to elevate the plows.-

17 The combination with a concreteroad finishing machine, of pivoted plows, meansfor limiting the movements of the plows to- Wards the forms, and yieldable means for normally holding the plows in predetermined positions. 4

18. In a concrete road finishing machine adapted to be advanced along a roadway at the sides of which are suitable rails upon which the finishing machine may be advanced, a templet or screed member adapted to rest upon the side rails and to be recipro-, cated substantially transversely of the road- III way as a unit, said screed having its under surface inclined with respect to the horizontal. Y

19. In a concrete road finishing machine adapted to be advanced along a roadway at the sides of which are suitable tracks upon which the machine may advance, a templet or screed member mounted upon said machine and adapted to rest upon the said tracks and to be reciprocated substantially transversely of the roadway, said member being tilted so as to have its under surface inclined and one of its longitudinal edges elevated.

20. The combination, in a concrete road 10 finishing machine, of a smoothing templet,

means for reciprocating the templet longitudinally of itself, a raker, and means alternately rendering said I'aker ineffective and effective during the reciprocation of the templet in opposite directions.

EDWARD G. CARR. 

